BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:Uncategorized DESCRIPTION:Topic: Underwater Bubble Resonator for Low-Frequency and Very-L ow-Frequency Seismo-acoustic Sources Abstract: The reducing impact of nois e from traditional air-guns on marine mammals is an actual problem for oil and gas producers. The application of coherent, broadband signals instead of explosive, high intensity, air-gun pulses is the potential way of nois e mitigation. The presentation focuses on a project by Teledyne being carr ied out as part of the Marine Vibrator Joint Industry Project (MVJIP), org anized by industry representatives and the Interior Department, National R esources Development Council (NRDC). Marine Vibrators are a coherent type of seismic source, which less harmful for marine inhabitants and gives a c learer, higher resolution imaging of the sub-bottom formations. Teledyne a s one of the participants in the MVJIP using a large underwater bubble res onator as a new type of seismic source. The cylindrical bubble keeps its s hape in the water and can be towed with the speed 8 knots. The polyurethan e membrane covering the gas-filled bubble supports a high-volume displacem ent. The experimental prototype with powerful blower as a driver has good performance with a maximum more than SPL 200 dB at the frequency of 5-12 H z. For a limited sound pressure level 185 dB in a frequency band 10-100 Hz the audio subwoofer driver shows very good performance. An underwater aco ustic subwoofer array operating in the 10–100 Hz range offers a potentia l efficiency of up to 20%, with a radiated signal spectral level comparabl e to the power of an air gun. This makes the system suitable for marine ge ophysical surveys.  Biography: Dr. Andrey K. Morozov has held the positio n of Chief Scientist at Teledyne TWR since 1999. Building on concepts prop osed by Walter Munk, he developed a high-efficiency, low-frequency, deep-w ater sound source that utilizes a tunable "organ pipe" resonator to genera te signals. Since 2001, these sources have been employed in numerous ocean tomography experiments across the Arctic, Atlantic, and Pacific Oceans. F rom 2012 to 2019, Andrey K. Morozov led a joint industry project to develo p a marine vibrator. He invented and fabricated several prototypes of ultr a-high-power marine vibrators operating in the 2–10 Hz and 10–100 Hz f requency ranges. While working at the Woods Hole Oceanographic Institution (WHOI) alongside Jim Preisig and Lee Freitag, he contributed to the devel opment of underwater communication methods by publishing research on multi -carrier modulation, OFDM technology, modal filtering using acoustic array s, and per-survivor processing algorithms. In collaboration with John Colo si, he conducted research and published papers on acoustic uncertainty the ory, ray and wave chaos, scintillation and entropy in long-range sound pro pagation. During his 27-year tenure at Teledyne TWR, he worked closely wit h Doug Webb and co-authored numerous patents across various fields. He ser ved as the principal investigator for Teledyne on DARPA projects. Andrey K . Morozov has over 50 years of experience in research and development in f ields such as communications, signal processing, and underwater acoustics. He is currently (2026-) an Adjunct Professor in the ECE Dept at UMass Dar tmouth. The Seminars is open to the public free of charge. *For further in formation, please contact Dr. Ana Doblas via email at adoblas@umassd.edu.\ nEvent page: https://www.umassd.edu/events/cms/10-16-26-ece-seminar-andrey -morozov-chief-scientist-teledyne.php X-ALT-DESC;FMTTYPE=text/html:

Topic: Underwater Bubble Resona tor for Low-Frequency and Very-Low-Frequency Seismo-acoustic Sources

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Abstract: The reducing impact of noise from traditional air-guns on mar ine mammals is an actual problem for oil and gas producers. The applicatio n of coherent\, broadband signals instead of explosive\, high intensity\, air-gun pulses is the potential way of noise mitigation. The presentation focuses on a project by Teledyne being carried out as part of the Marine V ibrator Joint Industry Project (MVJIP)\, organized by industry representat ives and the Interior Department\, National Resources Development Council (NRDC). Marine Vibrators are a coherent type of seismic source\, which les s harmful for marine inhabitants and gives a clearer\, higher resolution i maging of the sub-bottom formations. Teledyne as one of the participants i n the MVJIP using a large underwater bubble resonator as a new type of sei smic source. The cylindrical bubble keeps its shape in the water and can b e towed with the speed 8 knots. The polyurethane membrane covering the gas -filled bubble supports a high-volume displacement. The experimental proto type with powerful blower as a driver has good performance with a maximum more than SPL 200 dB at the frequency of 5-12 Hz. For a limited sound pres sure level 185 dB in a frequency band 10-100 Hz the audio subwoofer driver shows very good performance. An underwater acoustic subwoofer array opera ting in the 10–100 Hz range offers a potential efficiency of up to 20%\, with a radiated signal spectral level comparable to the power of an air g un. This makes the system suitable for marine geophysical surveys. 

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Biography: Dr. Andrey K. Morozov has held the position of Chief Scienti st at Teledyne TWR since 1999. Building on concepts proposed by Walter Mun k\, he developed a high-efficiency\, low-frequency\, deep-water sound sour ce that utilizes a tunable "organ pipe" resonator to generate signals. Sin ce 2001\, these sources have been employed in numerous ocean tomography ex periments across the Arctic\, Atlantic\, and Pacific Oceans. From 2012 to 2019\, Andrey K. Morozov led a joint industry project to develop a marine vibrator. He invented and fabricated several prototypes of ultra-high-powe r marine vibrators operating in the 2–10 Hz and 10–100 Hz frequency ra nges. While working at the Woods Hole Oceanographic Institution (WHOI) alo ngside Jim Preisig and Lee Freitag\, he contributed to the development of underwater communication methods by publishing research on multi-carrier m odulation\, OFDM technology\, modal filtering using acoustic arrays\, and per-survivor processing algorithms. In collaboration with John Colosi\, he conducted research and published papers on acoustic uncertainty theory\, ray and wave chaos\, scintillation and entropy in long-range sound propaga tion. During his 27-year tenure at Teledyne TWR\, he worked closely with D oug Webb and co-authored numerous patents across various fields. He served as the principal investigator for Teledyne on DARPA projects. Andrey K. M orozov has over 50 years of experience in research and development in fiel ds such as communications\, signal processing\, and underwater acoustics. He is currently (2026-) an Adjunct Professor in the ECE Dept at UMass Dart mouth.

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The Seminars is open to the public free of charge.

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*For further information\, please contact Dr. Ana Doblas via email at adob las@umassd.edu.

Event page: https ://www.umassd.edu/events/cms/10-16-26-ece-seminar-andrey-morozov-chief-sci entist-teledyne.php

DTSTAMP:20261001T152143 DTSTART;TZID=America/New_York:20261016T140000 DTEND;TZID=America/New_York:20261016T150000 LOCATION:Science & Engineering Building (SENG), Room 212 SUMMARY;LANGUAGE=en-us:ECE Seminar Speaker: Dr. Andrey K. Morozov, Chief Sc ientist, Teledyne TWR UID:c231c7b44fe79f3fc65fe2b4644c0d1d@www.umassd.edu END:VEVENT END:VCALENDAR